Put three chairs on each sideline with balls on them (as attackers), one coach is on each sideline, one with a ball, three defenders are in on-ball positions, three are in help positions, on a skip pass to the other coach, help defenders close out to the chairs (sprint on air time, chop feet, hands up, call "ball, ball, ball"), on-ball defenders sprint to help positions. Continue skip passing for 25 seconds, rotate in 6 new players.